Misc: In 1991 Miles Davis jazz musician, dies at 65 from---------- . ?

Questions

How many thousand million tonnes of carbon dioxide are formed each year by the combustion of fossil fuels?

What is the term for the study of how the inherited characteristics of a human population can be improved by genetics?

What technique records and reproduces three-dimmensional images using light from a laser but without the need for cameras or lenses?

In what sport is the arena 8 metres square?

In what sport does one have luffing, gybing and bearing away?